Race condition in the object-group ACL feature in Cisco IOS 15.5(2)T and earlier allows…
Priority LOW 23CWE-362Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · None · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Race condition in the object-group ACL feature in Cisco IOS 15.5(2)T and earlier allows remote attackers to bypass intended access restrictions via crafted network traffic that triggers improper handling of the timing of process switching and Cisco Express Forwarding (CEF) switching, aka Bug ID CSCun21071.
Why it matters now
EPSS 0.01426 73rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* | up to 15.5\(2\)t | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.5\(1\)t:*:*:*:*:*:*:* | 15.5(1)t | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.5\(1\)t1:*:*:*:*:*:*:* | 15.5(1)t1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.5t:*:*:*:*:*:*:* | 15.5t | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* Versions up to 15.5\(2\)t Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.5\(1\)t:*:*:*:*:*:*:* Versions 15.5(1)t Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.5\(1\)t1:*:*:*:*:*:*:* Versions 15.5(1)t1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.5t:*:*:*:*:*:*:* Versions 15.5t Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2015-0610
- 2026-10-03 Alias added: GHSA-cf75-gfh6-5482
References
More Cisco Ios vulnerabilities
- TI-2018-00138 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
- TI-2017-09019 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
- TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
- TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
- TI-2017-04499 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
- TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2015-0610 · CVE Program
- CVE-2015-0610 · NVD
- FIRST EPSS
- GHSA-cf75-gfh6-5482 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences